Decorative cover for use on a volatile dispenser unit or heater unit



FIG. 1 is a front, left side and top perspective view of a decorative cover for use on a volatile dispenser unit or heater unit in outline form showing my new tulip face design on the front thereof;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken line showing of a volatile substance dispenser unit in FIGS. 1 and 3-7 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a decorative cover for use on a volatile dispenser unit or heater unit, as shown and described. 